I've been running 17 x 48 (which is close) on an original Savage and melted a couple of spur gears.
These days the slipper while not torqued down 100%, is real close.
If I recall it's out a 1/2 turn and then set with a second nut.
I used to have problems where if I did a quick 180 spin and then rolling backwards when I laid down some power it would unscrew the spur nut. Adding the second nut solved that problem and the meltdowns.